Witnessing downsizing in the making: quiescent and breathing galaxies at the dawn of the Universe

Data, InHomepage, JWST, Science

Merlin et al. 2025, published on Open Journal of Astrophysics (and arXiv) The existence of a population of quiescent galaxies in the early Universe has been extensively confirmed observationally. We conduct a systematic search for log(M∗/M⊙) ≥ 9.5 quiescent galaxies...

A close look to nascent galaxies

for Astronomers, for Public, InHomepage, Outreach, Science

An international team of astronomers, led by R. Amorin and ohter ASTRODEEP scientists,  has pushed large telescopes to their current limits to discover a population of tiny newborn galaxies more than 11 billion light-years away, which shed new light into the first...

The evolution of cosmic star formation in the SCUBA-2 Cosmology Legacy Survey

InHomepage, Science

A new ASTRODEEP science paper by Bourne, N. et al, 2016, We present a new exploration of the cosmic star-formation history and dust obscuration in massive galaxies at redshifts 0.5<z<6. We utilize the deepest 450 and 850μm imaging from SCUBA-2 CLS, covering 230...

Infrared Color Selection of Massive Galaxies at z > 3

Science

A new ASTRODEEP science paper by  Wang, T. et al., 2016. We introduce a new color selection technique to identify high-redshift, massive galaxies that are systematically missed by Lyman-break selection. The new selection is based on the H160 (H) and Infrared Array...

Identification of z > 2 Herschel 500 μm Sources Using Color Deconfusion

Science

We present a new method to search for candidate z  2 Herschel 500 μm sources in the Great Observatories Origins Deep Survey-North field using a S500 μm/S24 μm “color deconfusion” technique. Potential high-z sources are selected against low-redshift ones...

The galaxy UV luminosity function at z ≃ 2-4; new results on faint-end slope and the evolution of luminosity density

Science

We present a new, robust measurement of the evolving rest-frame ultraviolet (UV) galaxy luminosity function (LF) over the key redshift range from z ≃ 2 to z ≃ 4. Our results are based on the high dynamic range provided by combining the Hubble Ultra Deep Field (HUDF),...